Brake-shoe.



A. H. REID.

BRAKE SHOE. APPLICATION FILED MAR.14, 1911.

WITNESSES INVENTOR. y a. ,4244. f W

A TTORNE Y.

ANDREW H. REID, OF TORONTO, ONTARIO, CANADA.

BRAKE-SHOE.

Application filed March 14, 1911.

Specification of Letters Patent.

Patented Feb. 20, 1912.

Serial No. 614,374.

To all whom it may concern:

Be it known that I, ANDREW II. REID, of the city of Toronto, in theProvince of Ontario, Canada, have invented certain new and usefulImprovements in Brake-Shoes, of which the following is a specification.

This invention relates to improvements in brake shoes provided with atubular reinforcement such as described and claimed in my prior UnitedStates Patent No. 943,995, dated December 21st, 1909, and CanadianPatent No. 122,502, dated December 14th, 1909.

In my prior construction the tubes embedded in the cast metal body ofthe shoe were employed as a reinforcement only; I have since discoveredthat a tube, or tubes, may be employed as an insert in the face of ashoe to enhance the braking effect. I have also devised a specialconstruction of tube which not only enables me to securely anchor a tubewhen it is employed as an insert, but also enables me to secure eitherwith a tubular reinforcement, a tubular insert, or both, the advantagesof the ordinary steel backed shoe.

The invention is clearly illustrated in the accompanying drawings inwhich Figure 1 is a longitudinal section of a brake shoe constructed inaccordance with my invention. Fig. 2 is a'central cross-section of thebrake shoe. Figs. 3 and 4: are cross-sections showing modifications.Figs. 5 and 6 are cross-sections of the reinforcement only showingvarious modifications.

In the drawings like letters of reference indicate corresponding partsin the different figures.

According to this present invention I employ a metal tube or tubes as africtional insert as well as a reinforcement. I therefore show a tube Aadjacent the face of the shoe and extending substantially from end toend thereof. This tube, while it may be of any ordinary form, ispreferably formed of sheet metal bent into tubular form. For the purposeof holding it in place, when the shoe is partly worn down an anchorplate or plates B are provided extending toward the back of the shoe andembedded in the cast metal thereof. The anchor plates may be separate,as shown in Fig. 5, or integral with the tubes, as shown in Figs. 2, 3,4. and 6. If the anchor plates are separate they preferably pass througha slot in the upper side of the tube and are bent to form the flanges CY which fit closely against the inner side of the tube. The integralconstruction is, however, preferred.

The anchor plates preferably flare as shown and are preferably providedwith openings D through which the cast metal of the shoe may flow. Theanchor plates B preferably extend to the back of the shoe and are thenturned parallel to the surface of the shoe to form the back plates E.These back plates may be formed either by turning the anchor platesinwardly toward one another, as shown in Fig. 5 and in the center tubeof Fig. 2, or they may be separated outwardly, as shown in Fig. 3 or inthe lateral reinforcement in Fig. 2. I thus secure the advantage of thetough metal backs now frequently employed with brake shoes.

The tubes in cross-section may be of any suitable form. For instanceround, as shown in Figs. 2, 3 and 5, diamond shaped, as shown in Fig. 6,or elliptical as shown in Fig. 4. In the forms shown in Figs. 3 and 4the division between the edges of the sheet of metal from which thereinforcement is formed may be at the lower edge of the tube.

The reinforcing tubes A are employed particularly as inserts in the faceof the shoe combining also, as described, the feature of the backplates. I prefer also to employ other tubes F as a reinforcement closeto the back of the shoe. These tubes may have combined therewith anchorplates and back plates and in general arrangement may resemble the tubesA with their plates B and back plates E.

In Fig. 2 I show the tubes F with integral anchor plates H lying closetogether, the back plates I being turned outwardly.

In Fig. 4 the tubular form is dispensed with, the reinforcement beingformed by bending a sheet of metal to form the plates H and the backs I.

I find that by the use of a tube as an insert in the face of the shoethat a good braking is obtained with excellent wearing qualities. At thesame time, owing to the connection of the tube with the anchor platesand back plates, a tube has no tendency to fall out when worn to lessthan half its diameter. The cooling effect of this tubular insert isalso marked and this tends also the lines described will satisfactorilyfulfil the objects of my invention as set out in the preamble to thisspecification.

What I claim as my invention is 1. A brake shoe having a tubular metalinsert adjacent its face and an anchor connected with the tubular insertextending toward the back of the shoe.

2. A brake shoe having a tubular metal insert adjacent its face andanchor plates connected With the tubular insert, extending toward theback of the shoe and spreading from the insert toward the sides.

3. A brake shoe having a tubular metal insert adjacent its face and ananchor plate connected with the tubular insert extending to the back ofthe shoe and having a back plate formed thereon lying at the back of theshoe.

1. A brake shoe having a tubular reinforcement formed of sheet metalbent to form a tubular portion and an anchor plate extending toward theback of the shoe.

5. A brake shoe having a tubular reinforcement formed of sheet metalbent to form a tubular portion and two anchor plates extending towardthe back of the shoe.

6. A brake shoe having a tubular reinforcement formed of sheet metalbent to form a tubular portion and two anchor plates extending towardthe back of the shoe, holes being formed in the plates through Whichcast metal may flow.

7. A brake shoe having a tubular reinforcement and an anchor plateconnected therewith extending toward the back of the shoe.

Toronto this 9th day of March 1911.

I ANDRElV H. REID.

Signed in the presence of J. EDW. MAYBEE, A. CAMPBELL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

